function initPage()
{
	
	var nod = document.getElementById("menu").getElementsByTagName("ul");
	_margin = (nod[0].parentNode.offsetWidth - nod[0].offsetWidth)/2;
	nod[0].style.marginLeft = _margin + "px";
}
if (window.addEventListener){
	window.addEventListener("load", initPage, false);
	window.addEventListener("resize", initPage, false);
}
else if (window.attachEvent && !window.opera){
	window.attachEvent("onload", initPage);
	window.attachEvent("onresize", initPage);
}